Can you describe the appearance and over how much of your body? Can you wrack your memory and think of anything out of the ordinary you ate, drank, or got exposed to or used? Even new kind of shampoo, or anything different from your regular routine foods/products? Even clothes detergent, anything.
Only one slight possibility as far as I know. I made some microwave popcorn on Wednesday evening. It was a brand new box of Act II butter. I’ve used it before, but haven’t had it for a couple of years. ???
As far as where the hives are... everywhere. The itchiest ones are on the back of my head (in my hair) and the areas around my chest. The ones on my upper arms are solid in an area about 5 x 3. Otherwise, I have areas of blotches. Also, on my legs and feet, they look more like individual hives about the size of peas.